The one guy with the tattoo in the swimming pool has the following text on his back (transliterated because I don't seem to be able to submit Cyrillic text here): "vsya vlast' sov'tam'!" (' = soft sign) What is sov'tam'? If this is a declaration whom to give all power (vsya vlast' to someone), then whatever sov'tam' is supposed to be needs to be in dative case, and no dative case can end with a soft sign. Is it sovyetam?
When Kensi calls G to update him on Varlamov's body condition, she says that the corpse is missing his "little finger", when actually is the middle finger, which had a tattoo on it.
Callen, who is supposedly a skilled Russian speaker, pronounces "slon" as if it rhymes with "swan" when in fact it rhymes with "loan." Because of the rules of vowel pronunciation in Russian, any student of the language would be able to pronounce it correctly even if he or she didn't know the meaning of the word.